"Send Feedback": include product "area" in feedback payload

## Problem

It is not clear which area of the Toolkit is being used, when feedback is sent.

## Proposal

1. Track "most recent used" service-id in AWS Explorer
2. Add "Send Feedback" action in more places (all wizards, all context menus?)
3. When "Send Feedback" action is invoked, include the context-relevant product area name or service-id, or fall back to the "most recent used" service-id

Start by locating the AWS Explorer service-id usage and the existing "Send Feedback" action. Trace how feedback is invoked from current contexts, then determine how the proposed wizard and context-menu coverage should identify an area or service-id, with the most recently used service-id as fallback.

Written by the indexing model from the issue text.